Foam Packs - F [1-20] / Collect all for infinite foam ammmo
F1: Gives you the foam gun
F2: Requires foam gun
F3: Requires foam gun
F4: Requires foam gun. Shoot the large box, then drop into the vent and move right. Open the vent above with foam
F5: Requires scuba mask, grenade. Dive into the water, grenade rocks in lower left corner
F6: Requires foam gun. Open the foam door, climb ladder and go to the left
F7: Requires foam gun. Open vent on lower right with foam, crawl down and to the right
F8: Jump down into the canyon, look in cave to the right
F9: Requires foam gun
F10: Requires double-jump
F11: Requires double-jump
F12: Jump down through the tracks, go left then jump up to the platform
F13: Jump up into the vent and wall jump up to the top, then crawl to the right
F14: Requires missiles, grenades
F15: Requires foam. Jump up into vent, follow it up and to the left
F16: Requires friction dampener. See video
F17: Requires triple jump, grappling hook, foam, and grenade. See video
F18: Requires grenade, friction dampener. Blow open the green panel in lower left corner of room, drop down onto conveyor belt and run right. Careful! Going left dumps you into an insta-death furnace! See video
F19: Requires foam gun
F20: Requires grenades, missiles. See video
